IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0610467
(2006-12-13)
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등록번호 |
US-8509234
(2013-08-13)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
An improved system and method for implementing communications hand over in a simple manner. RTP is used to signal to other terminals that an IP address has been changed for a particular. The receiving communications application notices from the RTP data flow that the other party in a communications
An improved system and method for implementing communications hand over in a simple manner. RTP is used to signal to other terminals that an IP address has been changed for a particular. The receiving communications application notices from the RTP data flow that the other party in a communications session has changed its IP address. Based on this information, the communications application adjusts the communications session without having to perform any session signaling.
대표청구항
▼
1. A method, comprising: receiving through a first interface of a terminal a plurality of first Real-Time Transport Protocol (RTP) packets from a remote terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address of the terminal and including a synchroniz
1. A method, comprising: receiving through a first interface of a terminal a plurality of first Real-Time Transport Protocol (RTP) packets from a remote terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address of the terminal and including a synchronization source (SSRC) identifier and first session content data of an RTP communication session, the RTP communication session for exchanging session data between the terminal and the remote terminal;initiating a hand over in the RTP communication session including initiating a second interface that changes an internet protocol address of the terminal from the initial IP address to a different IP address; andinforming the remote terminal that the hand over changed the internet protocol address of the terminal by transmitting, from the terminal, one or more second RTP packets to the remote terminal, wherein each RTP packet of the one or more second RTP packets includes the different IP address, the same SSRC identifier and one or more portions of second session content data, the one or more second RTP packets associated with the RTP communication session,wherein the one or more second RTP packets that include the different IP address, the same SSRC identifier, and one or more portions of second session data are the only signal that informs the remote terminal that the hand over changed the internet protocol address of the terminal. 2. The method of claim 1, further comprising, subsequent to transmitting the one or more second RTP packets, receiving a plurality of third RTP packets through the second interface from the remote terminal, the plurality of third RTP packets being directed to the different IP address. 3. The method of claim 1, further comprising: maintaining use of the first interface after the initiation of the second interface; andcontinuing to receive RTP packets through the first interface for a time after the hand over changed the internet protocol address of the terminal. 4. The method of claim 1, wherein the one or more second RTP packets are transmitted using timestamps and sequences that continue in order, without interruption, relative to previously-transmitted RTP packets that included the initial IP address, the same SSRC identifier, and previously-transmitted session content data. 5. One or more non-transitory computer-readable media storing computer readable-instructions that, when executed, cause an apparatus to at least: process a plurality of first Real Time Transport Protocol (RTP) packets received through a first interface of the apparatus from a remote terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address of the apparatus and including a synchronization source (SSRC) identifier and first session content data of an RTP communication session, the RTP communication session for exchanging session data between the apparatus and the remote terminal;initiate a hand over in the RTP communication session including initiating a second interface that changes an internet protocol address of the apparatus from the initial IP address to a different IP address; andinform the remote terminal that the hand over changed the internet protocol address of the apparatus by transmitting one or more second RTP packets to the remote terminal, wherein each RTP packet of the one or more second RTP packets includes the different IP address, the same SSRC identifier and one or more portions of second session content data, the one or more second RTP packets associated with the RTP communication session,wherein the one or more second RTP packets that include the different IP address, the same SSRC identifier, and the one or more portions of second session data are the only signal that informs the remote terminal that the hand over changed the internet protocol address of the apparatus. 6. The one or more non-transitory computer readable media of claim 5, further storing computer readable instructions that, when executed, further cause the apparatus to: subsequent to transmitting the one or more second RTP packets, process a plurality of third RTP packets received through the second interface from the remote terminal, the plurality of third RTP packets being directed to the different IP address. 7. The one or more non-transitory computer readable media of claim 5, further storing computer readable instructions that, when executed, cause the apparatus to: maintain use of the first interface after the initiation of the second interface; andcontinue to process RTP packets received through the first interface for a time after the hand over changed the internet protocol address of the apparatus. 8. The one or more non-transitory computer readable media of claim 5, wherein the one or more second RTP packets are transmitted using timestamps and sequences that continue in order, without interruption, relative to previously-transmitted RTP packets that included the initial IP address, the same SSRC identifier, and previously-transmitted session content data. 9. An apparatus, comprising: a processor; andmemory storing computer readable instructions configured to, with the processor, cause the apparatus to at least:process a plurality of first Real Time Transport Protocol (RTP) packets received through a first interface of the apparatus from a remote terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address of the apparatus and including a synchronization source (SSRC) identifier and first session content data of an RTP communication session, the RTP communication session for exchanging session data between the apparatus and the remote terminal;initiate a hand over in the RTP communication session including initiating a second interface that changes an internet protocol address of the apparatus from the initial IP address to a different IP address;inform the remote terminal that the hand over changed the internet protocol address of the apparatus by transmitting one or more second RTP packets to the remote terminal, wherein each RTP packet of the one or more second RTP packets includes the different IP address, the same SSRC identifier and one or more portions of second session data, the one or more second RTP packets associated with the RTP communication session,wherein the one or more second RTP packets that include the different IP address, the same SSRC identifier, and the one or more portions of second session data are the only signal that informs the remote terminal that the hand over changed the internet protocol address of the apparatus. 10. The apparatus of claim 9, wherein the memory further stores computer readable instructions configured to, with the processor, cause the apparatus to: subsequent to transmitting the one or more second RTP packets, process a plurality of third RTP packets received through the second interface from the remote terminal, the plurality of third RTP packets being directed to the different IP address. 11. The apparatus of claim 9, wherein the memory further stores computer readable instructions configured to, with the processor, cause the apparatus to: maintain use of the first interface after the initiation of the second interface; andcontinue to receive RTP packets through the first interface for a time after the hand over changed the internet protocol address of the apparatus. 12. The apparatus of claim 9, wherein the one or more second RTP packets are transmitted using timestamps and sequences that continue in order, without interruption, relative to previously-transmitted RTP packets that included the initial IP address, the same SSRC identifier, and previously-transmitted session content data. 13. A method comprising: transmitting, from a terminal, a plurality of first Real Time Transport Protocol (RTP) packets to a first interface of a remote terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address and including a synchronization source (SSRC) identifier and first session content data of an RTP communication session, the RTP communication session for exchanging session data between the terminal and the remote terminal;receiving, at the terminal, one or more second RTP packets from the remote terminal, wherein each RTP packet of the one or more second RTP packets includes a second IP address for the remote terminal, the same SSRC identifier and one or more portions of second session content data, the one or more second RTP packets associated with the RTP communication session; andsubsequent to receiving the one or more second RTP packets, transmitting a plurality of third RTP packets to a second interface of the remote terminal, the second interface corresponding to the second IP address, wherein the plurality of third RTP packets is associated with the RTP communication session;wherein the one or more second RTP packets are the only signal that informs the terminal of a hand over in the RTP communication session. 14. The method of claim 13, wherein the one or more second RTP packets include timestamps and sequences that continue in order, without interruption, relative to RTP packets previously-transmitted by the remote terminal that included the initial IP address, the same SSRC identifier, and previously-transmitted session content data. 15. An apparatus, comprising: a processor; andmemory storing computer readable instructions that, when executed, cause the apparatus to at least:transmit a plurality of first Real Time Transport Protocol (RTP) packets to a first interface of a remote terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address and including a synchronization source (SSRC) identifier and first session content data of an RTP communication session, the RTP communication session for exchanging session data between the apparatus and the remote terminal;process one or more second RTP packets received from the remote terminal, wherein each RTP packet of the one or more second RTP packets includes a second IP address for the remote terminal, the same SSRC identifier and one or more portions of second session content data, the one or more second RTP packets associated with the RTP communication session; andsubsequent to receiving the one or more second RTP packets, transmit a plurality of third RTP packets to a second interface of the remote terminal, the second interface corresponding to the second IP address, wherein the plurality of third RTP packets is associated with the RTP communication session;wherein the one or more second RTP packets are the only signal that informs the apparatus of a hand over in the RTP communication session. 16. The apparatus of claim 15, wherein the one or more second RTP packets include timestamps and sequences that continue in order, without interruption, relative to RTP packets previously-transmitted by the remote terminal that included the initial IP address, the same SSRC identifier, and previously-transmitted session content data. 17. A system comprising: a first terminal; anda second terminal configured to:receive through a first interface a plurality of first Real Time Transport Protocol (RTP) packets from the first terminal, the plurality of first RTP packets being directed to an initial internet protocol (IP) address of the second terminal and including a synchronization source (SSRC) identifier and first session content data of an RTP communication session, the RTP communication session for exchanging session data between the second terminal and the first terminal;initiate a hand over in the RTP communication session including initiating a second interface that changes an address of the second terminal from the initial IP address to a different IP address;informing the first terminal that the hand over changed the address of the second terminal by transmitting one or more second RTP packets to the first terminal, wherein each RTP packet of the one or more second RTP packets includes the different IP address for the second terminal, the same SSRC identifier and one or more portions of second session content data, the one or more second RTP packets associated with the RTP communication session,wherein the one or more second RTP packets that include the different IP address, the same SSRC identifier, and the one or more portions of second session data are the only signal that informs the first terminal that the hand over changed the address of the second terminal. 18. The system of claim 17, wherein the first terminal is configured to transmit a plurality of third RTP packets to the second interface, the second interface corresponding to the different IP address. 19. The system of claim 17, wherein the one or more second RTP packets include timestamps and sequences that continue in order, without interruption, relative to RTP packets previously-transmitted by the second terminal that included the initial IP address, the same SSRC identifier, and previously-transmitted session content data. 20. The system of claim 17, wherein the second terminal is configured to: continue the use of the first interface after the initiation of the second interface;continue receiving RTP packets through the first interface from the first terminal for a time after the hand over changed the address of the second terminal.
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